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D( v )
v = 0
v = 0
v = 0
v in (-oo:0) U (0:+oo)
2-(3/v) < 5/v // - 5/v
2-(3/v)-(5/v) < 0
2-3*v^-1-5*v^-1 < 0
-8*v^-1 < -2
-8*v^-1 < -2 // * -1
8*v^-1 > 2
8*v^-1 > 2 // : 8
v^-1 > 2/8
v^-1 > 1/4
1/(v^1) > 1/4
v <> 0
1/(v^1) > 1/4 // * v^2
(v^2)/(v^1) > 1/4*v^2
v^1 > 1/4*v^2
v-1/4*v^2 > 0
v^1*(1-1/4*v) > 0
v < 0
-(abs(v))^1*(1/4*(abs(v))^1+1) > 0 // : -(abs(v))^1
1/4*(abs(v))^1+1 < 0
1/4*(abs(v))^1 < -1 // : 1/4
(abs(v))^1 < -1/1/4
(abs(v))^1 < -4 // ^ 1/1
abs(v) < (-4)^(1/1)
abs(v) < -4
v belongs to the empty set
v < 0
v > 0
v^1*(1-(1/4*v^1)) > 0 // : v^1
1-(1/4*v^1) > 0
1 > 1/4*v^1 // : 1/4
1/1/4 > v^1 // ^ 1/1
(1/1/4)^(1/1) > v
v in (0:4)
v > 0
v in (0:4)
v in (0:4)
(0:4)
| 2x^2+7x-44= | | 4/7y-2=6 | | -2.8x-3.4=2.9 | | 5x-5=-x-7 | | 135/150 | | 2(3x+7)=6-(x-1) | | (3y+5)=(2y-7) | | (4b-3)(2b+3b+5)= | | 544=2x+y | | -1.9x+3.7=1.9 | | x*(x/30000) | | 17-(4x-9)+15=3(4x-5) | | 72=12 | | 5/25-1/x=6 | | 5x-1/6=-5/18 | | 2(4x+6)=-8+2x | | 83+2x+14=10x+1 | | -3(w+1)=-3(4w-2)+3 | | 3(3x+10)=120 | | 66+32=x | | -1-8=25 | | 18(-3x+5)=5(x-1)-6 | | 48+20=x | | M*2-5m-24=0 | | 5x-9+x+40=8x+10-5x | | 3(5x-7)=14 | | X^2+40=60 | | -2/5x=-16 | | -4x^2+22x-36=0 | | 6(2p+20)+6p=30 | | x+24=3(x+4) | | 11/2n-4/3n=5 |